JP6396123B2 - Powder coating equipment - Google Patents

Description

  The present invention relates to a powder coating apparatus, and more particularly to a powder coating apparatus for attaching powder to a film.

  Conventionally, various methods such as a spray method have been proposed as a method for attaching powder to a substrate such as a film.

  Among these, the aerosol deposition method has attracted particular attention from the viewpoint of being able to form a dense layer on the substrate.

  An apparatus used for the aerosol deposition method is disclosed in Patent Document 1, for example.

  The apparatus disclosed in Patent Document 1 includes a film formation chamber having a space for adhering powder to a substrate therein, an aerosol chamber for storing powder raw materials, and a carrier gas transport device. A pedestal for placing and fixing the base material and a nozzle for spraying powder onto the base material are housed therein.

JP 2013-129987 A

  However, the apparatus of Patent Document 1 is a batch type. That is, in the apparatus of Patent Document 1, every time a coating process is performed on one base material, it is necessary to put in and out the base material from the film forming chamber, resulting in poor production efficiency. Therefore, there is a need for a continuous device.

  The adoption of a roll-to-roll system is considered as a continuous system. Specifically, a method of arranging a pair of rolls inside the film forming chamber and continuously adhering the powder to the base material while winding the base material from one roll to the other roll is considered.

  By the way, in the method of spraying powder onto the substrate, a part of the powder ejected from the spray nozzle toward the substrate is scattered in the air, that is, inside the film forming chamber, without adhering to the substrate. . When the scattered powder accumulates inside the film forming chamber, it adheres to a roll, a coated substrate, or the like. If it does so, there exists a malfunction which causes the malfunctioning of a roll-to-roll apparatus and the quality defect of the coated base material.

  An object of the present invention is to provide a continuous powder coating apparatus capable of reducing the influence of scattered powder.

  The powder coating apparatus of the present invention is a powder coating apparatus for adhering powder to a film, and is disposed on the downstream side in the film transport direction with respect to the delivery roll for delivering the film and the delivery roll. A winding roll that winds up the film, and a nozzle that is arranged to face the film in the middle of the conveying direction of the sending roll and the winding roll, and jets the powder; The internal pressure of one or more roll chambers for accommodating the winding roll, the apparatus chamber for accommodating the nozzle and the roll chamber, and the internal pressure of the roll chamber is set higher than the internal pressure of the apparatus chamber. And a pressure adjusting unit configured as described above.

  According to this powder coating apparatus, since the pressure adjustment unit sets the internal pressure of the roll chamber higher than the internal pressure of the apparatus chamber, the powder scattered in the relatively low-pressure apparatus chamber is relatively Therefore, it is possible to suppress the entry into the high-pressure roll chamber. Therefore, the powder can be prevented from adhering to a roll or a coated film, and the influence of the powder can be reduced.

  The powder coating apparatus of the present invention preferably includes two roll chambers, one roll chamber containing the delivery roll, and the other roll chamber containing the take-up roll. .

  According to this powder coating apparatus, since the delivery roll and the take-up roll are accommodated in the respective roll chambers, the relative position and distance between the delivery roll and the take-up roll can be freely adjusted. it can. Therefore, the degree of freedom in device design can be improved.

  The powder coating apparatus of the present invention preferably includes one roll chamber, and the one roll chamber accommodates the delivery roll and the take-up roll.

  According to this powder coating apparatus, since only the internal pressure of one roll chamber needs to be set higher than the internal pressure of the apparatus chamber, the apparatus can be simplified.

  In the powder coating apparatus of the present invention, it is preferable that the pressure adjusting unit includes a gas delivery unit that feeds gas into the roll chamber.

  According to this powder coating apparatus, the internal pressure of the roll chamber can be set higher than the internal pressure of the apparatus chamber simply and reliably.

  Further, the powder coating apparatus according to the present invention is disposed on the downstream side of the nozzle and the upstream side of the take-up roll in the transport direction so as to face the film, and the excess powder adhered to the film. It is preferable to further include a powder removing unit for removing the body.

  According to this powder coating apparatus, it is possible to remove excess powder adhered to the film, so that the quality of the coated film can be made constant.

  According to the powder coating apparatus of the present invention, it is possible to reduce the influence of the powder scattered in the film forming chamber on the apparatus.

FIG. 1 shows a schematic configuration diagram of a first embodiment of a powder coating apparatus of the present invention. FIG. 2 shows a schematic configuration diagram of a second embodiment of the powder coating apparatus of the present invention. FIG. 3 is a perspective view of the second casing and the film forming nozzle in the powder coating apparatus of FIG. FIG. 4 is a schematic configuration diagram of a powder coating apparatus when the aerosol deposition method is employed in the first embodiment.

1. 1. First embodiment 1-1. Powder Coating Device A first embodiment of the powder coating device of the present invention will be described with reference to FIG.

  In the description of FIG. 1, when referring to the direction of the powder coating apparatus, the vertical direction in FIG. 1 is the “vertical direction” (first direction), the upper side is the upper side, and the lower side is the lower side. It is. 1 is the “front-rear direction” (second direction, direction orthogonal to the first direction), the right direction on the paper is the front side, and the left direction on the paper in FIG. 1 is the rear side. 1 is the “width direction” (the direction orthogonal to the third direction, the first direction, and the second direction), the front side of the paper thickness is one side in the width direction, and the back side in the paper thickness direction is the width direction. On the other side. 4 is also based on the direction of FIG.

  The powder coating apparatus 1 is an apparatus for attaching the powder 3 to the film 2 and includes a transport unit 4 and an injection unit 5.

  The transport unit 4 includes a device casing 6 as an example of a device chamber, and a delivery unit 7 and a winding unit 8 accommodated in the device casing 6.

  The apparatus casing 6 is formed in a box shape capable of sealing the inside. The apparatus casing 6 accommodates a delivery unit 7, a winding unit 8, a film forming nozzle 18 (described later) and a stage 19 (described later).

  The device casing 6 is a device casing 6 (specifically, a space inside the device casing 6, excluding a space occupied by a first casing 9 (described later) and a second casing 13 (described later)). A pressure gauge 51 for measuring the internal pressure of the space is provided.

  The delivery unit 7 is disposed at the lower end and the front side of the inside of the apparatus casing 6.

  The delivery unit 7 includes a first casing 9 as an example of a roll chamber, a delivery roll 10, a first tension roll 11a, and a second tension roll 11b.

  The first casing 9 is formed in a box shape (see FIG. 3) extending in the width direction, and houses the delivery roll 10, the first tension roll 11a, and the second tension roll 11b. A delivery opening 12 is formed above the rear wall of the first casing 9. The delivery opening 12 is formed in a slit shape extending in the width direction.

  The first casing 9 includes a pressure gauge 52 for measuring the internal pressure of the first casing 9.

  The delivery roll 10 is a cylindrical member having a rotation axis for delivering the film 2 and is formed to extend in the width direction. The delivery roll 10 is disposed at the lower end inside the first casing 9. The film 2 is wound around the surface of the delivery roll 10 so that the back surface (the surface opposite to the side to be coated) faces the roll surface. A gear (not shown) is provided at the end of the rotating shaft of the delivery roll 10, and a driving force for rotating the delivery roll 10 in the direction of the arrow is input to the gear from a motor (not shown). Is done.

  The first tension roll 11a is a columnar member having a rotation shaft for satisfactorily holding the tension of the film 2 delivered from the delivery roll 10, and is formed to extend in the width direction. The first tension roll 11 a is disposed on the upper side and the rear side of the delivery roll 10.

  The second tension roll 11b is a columnar member having a rotating shaft for favorably holding the tension of the film 2 conveyed from the first tension roll 11a, and is formed to extend in the width direction. The second tension roll 11b is disposed on the upper side of the delivery roll 10 and on the front side of the first tension roll 11a.

  The winding unit 8 is disposed on the lower end portion and the rear side inside the apparatus casing 6 so as to face the sending unit 7 with a space therebetween.

  The winding unit 8 includes a second casing 13 as an example of a roll chamber, a winding roll 14, a third tension roll 15a, and a fourth tension roll 15b.

  The second casing 13 is formed in a box shape (see FIG. 3) extending in the width direction, and accommodates the winding roll 14, the third tension roll 15a, and the fourth tension roll 15b. A winding opening 17 is formed on the upper side of the front wall of the second casing 13. The winding opening 17 is formed in a slit shape extending in the width direction.

  The second casing 13 includes a pressure gauge 53 for measuring the internal pressure of the second casing 13.

  The winding roll 14 is a cylindrical member having a rotation shaft for winding the coated film 2 and is formed to extend in the width direction. The winding roll 14 is arranged at the lower end portion inside the second casing 13. The winding roll 14 is disposed on the rear side with respect to the delivery roll 10. That is, the take-up roll 14 is disposed downstream of the delivery roll 10 in the transport direction of the film 2 (hereinafter simply referred to as “transport direction”). After the powder coating apparatus 1 is started, the coated film 2 is wound around the surface of the winding roll 14 so that the back surface thereof faces the roll surface. A gear (not shown) is provided at the end of the rotating shaft of the take-up roll 14, and a driving force for rotating the take-up roll 14 in the direction of the arrow is applied to the gear by a motor (not shown). It is input from.

  The third tension roll 15a is a columnar member having a rotating shaft for satisfactorily holding the tension of the coated film 2 fed from the winding opening 17, and is formed to extend in the width direction. . The third tension roll 15 a is disposed on the upper side of the take-up roll 14.

  The fourth tension roll 15b is a cylindrical member having a rotating shaft for favorably maintaining the tension of the coated film 2 conveyed from the third tension roll 15a, and is formed to extend in the width direction. The fourth tension roll 15b is disposed on the upper side of the winding roll 14 and on the front side of the third tension roll 15a.

  The injection unit 5 includes a film forming nozzle 18 as an example of a nozzle, a stage 19, an injection device 20, and a connecting pipe 22.

  The film forming nozzle 18 is an ejection device for ejecting the powder 3 toward the surface of the film 2. The film forming nozzle 18 is arranged on the upper side inside the apparatus casing 6 and in the middle of the first casing 9 and the second casing 13 in the front-rear direction so that the injection port faces the lower side (that is, the stage 19). Has been. In other words, the film forming nozzle 18 is arranged in the apparatus casing 6 so that the injection port faces the film 2 in the middle of the conveying direction of the delivery roll 10 and the take-up roll 14. Thereby, the film forming nozzle 18 can spray the powder 3 supplied from the spray device 20 onto the surface of the film 2 conveyed to the upper surface of the stage 19.

  The shape of the injection port of the film forming nozzle 18 is formed so as to extend in the width direction, as shown in FIG.

  The stage 19 is formed in a substantially rectangular shape extending in the width direction in plan view, and formed in an arcuate shape (arc shape) that protrudes upward in a side view as viewed from one side in the width direction to the other side in the width direction. Has been. The stage 19 is disposed to face the lower side with a gap from the film forming nozzle 18, and in the middle of the first casing 9 and the second casing 13 in the front-rear direction, the stage 19 is spaced from the first casing 9 and the second casing 13. Oppositely arranged apart. The stage 19 is arranged such that the most convex portion (uppermost surface portion) 35 is located slightly above the vertical position of the delivery opening 12 and the winding opening 17. The most convex portion 35 of the stage 19 is closest to the ejection port of the film forming nozzle 18. The distance between the most convex portion 35 and the spray nozzle of the film forming nozzle 18 is, for example, 0.5 mm or more, preferably 1 mm or more, and, for example, 100 mm or less, preferably 50 mm or less. Thereby, the film 2 is coated with the powder 3 ejected from the film forming nozzle 18 at the most convex portion 35.

  The stage 19 is supported and fixed to the apparatus casing 6 via an XYZ moving stage (not shown). By aligning the XYZ moving stage automatically or manually, the position of the stage 19 can be corrected with respect to the film forming nozzle 18.

  The injection device 20 is a device that stores the powder 3 and sends the powder 3 to the film forming nozzle 18, and specifically includes a device used in a known injection method.

  Known injection methods include, for example, the aerosol deposition method (AD method / gas deposition method (gas deposition method)), cold spray method (high pressure cold spray method, low pressure cold spray method), thermal spray method (plasma spray method). , Arc spray method, flame spray method) and the like.

  The connecting pipe 22 is arranged so that one end thereof is connected to the injection device 20 and the other end is connected to the film forming nozzle 18 through the upper wall of the apparatus casing 6.

  Such a powder coating apparatus 1 includes a pressure adjustment unit 16. Specifically, the pressure adjustment unit 16 includes a gas inflow pipe 30 as an example of a gas delivery unit. The gas inflow pipe 30 includes a first gas inflow pipe 30a provided in the first casing 9 and a second gas inflow pipe 30a. And a second gas inflow pipe 30 b provided in the casing 13.

  The first gas inflow pipe 30a has one end (outflow side end) positioned inside the first casing 9, and the other end (inflow side end) is the front wall of the apparatus casing 6 and the first casing. 9 is arranged so as to pass through the front wall 9 and to be located outside the casing 6 for the apparatus. One end portion of the first gas inflow pipe 30 a is disposed at the lower end in the first casing 9 so as to face the delivery roll 10.

  A pump (not shown) for sending outside air, compressed air, or the like into the first casing 9 is connected to the other end of the first gas inflow pipe 30a.

  The second gas inflow pipe 30b has one end (outflow side end) located inside the second casing 13, and the other end (inflow side end) is the rear wall of the apparatus casing 6 and the second casing. 13 is arranged so as to pass through the rear wall of 13 and to be located outside the apparatus casing 6. One end portion of the second gas inflow pipe 30 b is disposed at the lower end facing the winding roll 14 inside the second casing 13.

  A pump (not shown) for sending outside air, compressed air, or the like into the second casing 13 is connected to the other end of the second gas inflow pipe 30b.

  The powder coating apparatus 1 includes a cleaning nozzle 31 as an example of a powder removing unit and an air jet nozzle 32.

  A plurality (two) of cleaning nozzles 31 are provided in the vicinity of the winding opening 17 disposed in the middle of the film forming nozzle 18 and the winding roll 14 in the front-rear direction. That is, the two cleaning nozzles 31 (31 a and 31 b) are provided on the downstream side in the transport direction of the film forming nozzle 18 and on the upstream side in the transport direction of the winding roll 14.

  The cleaning nozzle 31 (31a, 31b) is supported and fixed to the second casing 13. The two cleaning nozzles 31 are arranged at a distance from each other with the take-up opening 17 (film 2) interposed therebetween so that the spray ports face each other. Specifically, one of the cleaning nozzles 31a is arranged on the upper side of the winding opening 17 (film 2) with a gap from the film 2 to be transported so that the injection port faces downward and forward. . The other cleaning nozzle 31b is arranged on the lower side of the winding opening 17 (film 2) with a gap from the film 2 to be conveyed so that the jet port faces upward and frontward.

  One air jet nozzle 32 is provided in the vicinity of the delivery opening 12 arranged in the middle of the delivery roll 10 and the film forming nozzle 18 in the front-rear direction. That is, the air jet nozzle 32 is provided on the downstream side in the transport direction of the delivery roll 10 and on the upstream side in the transport direction of the film forming nozzle 18.

  The air jet nozzle 32 is supported and fixed to the first casing 9. The air jet nozzle 32 is disposed so as to face the delivery opening 12 (film 2). Specifically, the air jet nozzle 32 is arranged at a distance from the film 2 to be transported at the lower side of the delivery opening 12 (film 2) so that the injection port faces the upper side and the rear side.

1-2. Coating Method A coating method for attaching the powder 3 to the film 2 using the powder coating apparatus 1 will be described.

  First, as shown in FIG. 1, the film 2 is set on the transport unit 4.

  Specifically, the film 2 is wound around the delivery roll 10 so that the back surface thereof faces the front surface of the delivery roll 10. Next, the film 2 is fed out, and sequentially passes through the rear side surface of the first tension roll 11a, the front side surface of the second tension roll 11b, and the delivery opening 12. Thereafter, the stage 19 and the film forming nozzle 18 are passed so as to come into contact with the most convex portion 35 of the stage 19. Next, the winding opening 17, the rear side surface of the third tension roll 15 a, and the front side surface of the fourth tension roll 15 b are passed through and locked to the winding roll 14.

  The film 2 is a long film in the transport direction having a predetermined width, and examples thereof include a resin film and a metal foil.

  Examples of the material for the resin film include thermoplastic resins and thermosetting resins. Examples of the thermoplastic resin include olefin resins such as polyethylene and polypropylene, polyester resins such as PET, fluorine resins such as PTFE, polyamide resins such as nylon, polyimide resins, Examples thereof include polyvinyl chloride cellulose fiber and silicone fiber. Examples of the thermosetting resin include an epoxy resin, a phenol resin, an amino resin, and an unsaturated polyester resin.

  Examples of the metal foil material include copper, iron, stainless steel, and aluminum.

  The thickness of the film 2 is not limited and is, for example, 5 μm or more, preferably 10 μm or more, and for example, 500 μm or less, preferably 100 μm or less.

  Next, by flowing gas into each of the first casing 9 and the second casing 13 through the gas inflow pipes 30 (30a, 30b), the internal pressure of the first casing 9 and the second casing 13 is reduced. It is set higher than the internal pressure (specifically, the pressure in the space excluding the space occupied by the first casing 9 and the second casing 13).

  The internal pressure of the apparatus casing 6 is, for example, 1 Pa or more, preferably 10 Pa or more, more preferably 50 Pa or more, and for example, 80,000 Pa or less, preferably 10,000 Pa or less, more preferably 1000 Pa or less.

  The internal pressures of the first casing 9 and the second casing 13 are, for example, 10 Pa or more, preferably 50 Pa or more, more preferably 100 Pa or more, and for example, 80000 Pa or less, preferably 10000 Pa or less, more preferably. Is 2100 Pa or less.

  The difference between the internal pressure of the first casing 9 and the internal pressure of the apparatus casing 6 is, for example, 10 Pa or more, preferably 100 Pa or more, and for example, 10000 Pa or less, preferably 1000 Pa or less.

  The difference between the internal pressure of the second casing 13 and the internal pressure of the apparatus casing 6 is, for example, 10 Pa or more, preferably 100 Pa or more, and for example, 10000 Pa or less, preferably 1000 Pa or less.

  Next, the film 2 is conveyed by rotationally driving the delivery roll 10 and the take-up roll 14 in the direction of the arrow in FIG.

  Specifically, the film 2 is conveyed from the delivery roll 10 in the order of the rear side surface of the first tension roll 11 a, the front side surface of the second tension roll 11 b, and the delivery opening 12. Then, it conveys from the sending opening part 12 in order of the most convex part 35 of the stage 19, and the winding opening part 17, ie, toward the back side from the front side. Thereafter, the paper is conveyed from the winding opening 17 in the order of the rear side surface of the third tension roll 15 a, the front side surface of the fourth tension roll 15 b, and the winding roll 14, and is taken up by the winding roll 14. It is done.

  A conveyance speed is 0.05 m / min or more, for example, Preferably, it is 0.1 m / min or more, for example, is 100 m / min or less, Preferably, it is 50 m / min or less.

  On the other hand, powder 3 (material) is filled in the injection device 20.

  The powder 3 is not particularly limited, and examples thereof include metal oxide powder, metal powder, and resin powder.

  Examples of the material for the metal oxide powder include alumina, yttria, zirconia, and titania.

  Examples of the metal material include copper, iron, stainless steel, and aluminum.

  Examples of the resin material include a thermoplastic resin and a thermosetting resin. Examples of the thermoplastic resin include olefin resins such as polyethylene and polypropylene, polyester resins such as PET, fluorine resins such as PTFE, polyamide resins such as nylon, polyimide resins, Examples thereof include polyvinyl chloride cellulose fiber and silicone fiber. Examples of the thermosetting resin include an epoxy resin, a phenol resin, an amino resin, and an unsaturated polyester resin.

  These can be used alone or in combination of two or more.

  The average particle diameter (median diameter) of the powder is, for example, 0.05 μm or more and 10 μm or less. In particular, when the aerosol deposition method described later is used, it is preferably 0.1 μm or more, more preferably 0.5 μm or more, and preferably 10 μm or less, more preferably 2.5 μm or less. The average particle diameter (median diameter) is measured by, for example, a particle size distribution measuring apparatus using a dynamic light scattering method.

  Next, the powder 3 is sprayed from the film forming nozzle 18 to the lower side, that is, toward the film 2 to be transported by a known spraying method (a spraying step).

  Thus, the film 2 delivered from the delivery roll 10 is attached (coated) with the powder 3 in the middle of the transport direction between the delivery roll 10 and the take-up roll 14. And the film 2 to which the powder 3 adhered is wound up by the winding roll 14 arrange | positioned in the conveyance direction downstream.

  Further, in the spraying process, gas is discharged from the air jet nozzle 32 toward the film 2 at the delivery opening 12, and gas is discharged toward the film 2 from the cleaning nozzle 31 (31 a, 32 b) at the winding opening 17. Discharge.

  Thereby, in the delivery opening part 12, since the gas from the air jet nozzle 32 collides with the back surface of the film 2, it can suppress that the powder 3 adheres to the back surface of the film 2. FIG. As a result, it is possible to prevent the back surface to which the powder 3 is adhered from coming into contact with the stage 19 and deforming the film.

  On the other hand, since the gas from the two cleaning nozzles 31 (31a, 32b) collides with the front surface and the back surface of the film 2 to which the powder 3 is adhered in the winding opening 17, excess powder adhered to the film 2 Body 3 is removed.

  According to the powder coating apparatus 1, the delivery roll 10, the winding roll 14 disposed on the rear side (downstream in the transport direction) with respect to the delivery roll 10, the delivery roll 10 and the winding roll 14, The film forming nozzle 18 disposed so as to face the film 2 midway in the front-rear direction (in the conveyance direction), the first casing 9 that houses the delivery roll 10, and the second casing 13 that houses the take-up roll 14 And the internal pressure of each of the film forming nozzle 18, the first casing 9 and the second casing 13, and the first casing 9 and the second casing 13 are set higher than the internal pressure of the apparatus casing 6. And a pressure adjustment unit 16.

  Therefore, it is possible to prevent the powder 3 scattered inside the relatively low-pressure apparatus casing 6 from entering the relatively high-pressure first casing 9 and second casing 13. As a result, it is possible to prevent the powder 3 from adhering to the gears that drive the first casing 9 and the second casing 13, the delivery roll 10 and the take-up roll 14, the coated film 2, and the like. Therefore, the influence by the powder 3 can be reduced.

  Further, the powder coating apparatus 1 includes a first casing 9 and a second casing 13, where the first casing 9 accommodates the delivery roll 10 and the second casing 13 accommodates the winding roll 14.

  Therefore, the relative position and distance between the delivery roll 10 and the take-up roll 14 can be freely adjusted. As a result, the degree of freedom in device design can be improved.

  Further, in the powder coating apparatus 1, the gas is fed into the first casing 9 and the second casing 13 from the outside of the apparatus casing 6 using the gas inflow pipe 30, and the first casing 9 and the second casing 13 are sent. The internal pressure is adjusted.

  Therefore, the internal pressure of the first casing 9 and the second casing 13 can be set higher than the internal pressure of the apparatus casing 6 simply and reliably.

1-3. Modification In the embodiment of FIG. 1, two cleaning nozzles 31 are provided in the vicinity of the winding opening 17. For example, although not shown, one cleaning nozzle 31 may be provided, or the cleaning nozzle 31. May not be provided.

  Preferably, the powder coating apparatus 1 includes two cleaning nozzles 31. Thereby, the excess powder 3 to which the film 2 is adhered can be surely removed, and the quality of the coated film 2 can be made constant. Moreover, since the excess powder 3 is automatically removed from the film 2 wound on the take-up roll 14 by the cleaning nozzle 31, the process of removing the powder 3 from the film 2 in the subsequent use is performed. It can be unnecessary.

  In the embodiment of FIG. 1, the air jet nozzle 32 is provided in the vicinity of the delivery opening 12, but for example, although not shown, the air jet nozzle 32 may not be provided.

  Preferably, the powder coating apparatus 1 includes an air jet nozzle 32. Thereby, it can suppress that the powder 3 adheres to the back surface of the film 2. Therefore, the back surface to which the powder 3 is adhered can be prevented from coming into contact with the stage 19 and the film being deformed.

  In the embodiment of FIG. 1, by flowing gas into each of the first casing 9 and the second casing 13 through the gas inflow pipes 30 (30a, 30b), the internal pressures of the first casing 9 and the second casing 13 are Although it is set higher than the internal pressure of the apparatus casing 6, for example, although not shown, a vacuum pump or the like is attached to the apparatus casing 6 to lower the inside of the apparatus casing 6 while the gas inflow pipe 30 ( The internal pressure of the first casing 9 and the second casing 13 can be set higher than the internal pressure of the apparatus casing 6 by opening the first casing 9 and the second casing 13 to the atmosphere through 30a and 30b). .

  In the embodiment of FIG. 1, the powder 3 is attached only to the surface of the film 2. However, for example, although not shown, the powder 3 can be attached to both surfaces (front surface and back surface) of the film 2. Specifically, after the powder 3 is attached to the surface of the film 2 and the film 2 is completely wound around the winding roll 14, the winding roll 14 that winds up the film 2 and the delivery roll 10 are attached and detached. Exchange. Next, the film 2 is conveyed from the take-up roll 14 to the delivery roll 10 so that the powder 3 adheres to the back surface of the film 2 at the most convex portion 35 of the stage 19.

  Although not shown, the powder 3 can be simultaneously attached to both surfaces of the film 2 by appropriately adjusting the shape and position of the stage 19 and further disposing a film forming nozzle on the lower side of the stage 19. .

  1 and 3 includes one film forming nozzle 18 formed so that the shape of the injection hole extends in the width direction. For example, although not shown, the film forming nozzle 18 is formed in the width direction. It is also possible to provide a plurality of film forming nozzles aligned with each other.

  In the embodiment of FIG. 1, four tension rolls (11a, 11b, 15a, 15b) are provided. For example, although not shown, the number of tension rolls can be increased or decreased as appropriate.

2. Second Embodiment With reference to FIG. 2, a second embodiment of the powder coating apparatus of the present invention will be described.

  In the description of FIG. 2, members similar to those in the embodiment of FIG. 1 are denoted by the same reference numerals, and details thereof are omitted.

  In addition, when referring to the direction of the powder coating apparatus, the vertical direction in FIG. 2 is defined as the “vertical direction” (first direction), the upper side being the upper side and the lower side being the lower side. 2 is a “front-rear direction” (second direction, a direction orthogonal to the first direction), the right direction on the paper is the front side, and the left direction on the paper in FIG. 2 is the rear side. 2 is the “width direction” (the direction orthogonal to the third direction, the first direction, and the second direction), the front side of the paper thickness is one side in the width direction, and the back side of the paper thickness direction is the width direction. On the other side. 3 is also based on the direction of FIG.

  The powder coating apparatus 40 of the second embodiment includes a transport unit 41 and an injection unit 5.

  The transport unit 41 includes a device casing 6 and a sending / winding unit 42 housed inside the device casing 6.

  The delivery / winding unit 42 is disposed on the front side of the inside of the apparatus casing 6.

  The delivery / winding unit 42 includes a roll casing 43 as an example of a roll chamber, a delivery roll 10, a take-up roll 14, a first tension roll 11a, a second tension roll 11b, and a third tension roll. 15a and a fourth tension roll 15b.

  The roll casing 43 is formed in a box shape (see FIG. 3) extending in the width direction, and includes a feed roll 10, a take-up roll 14, a first tension roll 11a, a second tension roll 11b, a third tension roll 15a, and a first roll. A 4-tension roll 15b is accommodated.

  A delivery opening 12 and a winding opening 17 are formed in the rear wall of the roll casing 43. The delivery opening 12 is formed on the upper side of the rear wall of the roll casing 43 so as to extend in the width direction. The winding opening 17 is formed to extend in the width direction below the rear wall at a distance from the delivery opening 12.

  The delivery roll 10 is disposed on the upper side and the front side of the roll casing 43.

  The winding roll 14 is disposed on the lower side and the front side of the roll casing 43. That is, the winding roll 14 is disposed opposite to the lower side of the delivery roll 10.

  The first tension roll 11 a is disposed on the rear side of the delivery roll 10.

  The second tension roll 11b is disposed behind the delivery roll 10 and above the first tension roll 11a.

  The third tension roll 15 a is disposed on the rear side of the winding roll 14.

  The fourth tension roll 15b is disposed on the rear side of the winding roll 14 and on the upper side of the third tension roll 15a.

  The roll casing 43 includes a pressure gauge 54 for measuring the internal pressure of the roll casing 43.

  The injection unit 5 includes a film forming nozzle 18, a stage 19, an injection device 20, and a connecting pipe 22.

  The film forming nozzle 18 is disposed to face the rear wall of the roll casing 43 at a distance on the rear side. Further, the vertical position of the film forming nozzle 18 is arranged so as to be between the vertical direction of the delivery opening 12 and the winding opening 17. The spray nozzle of the film forming nozzle 18 is disposed so as to face the front stage 19.

  The stage 19 is formed in a substantially rectangular shape extending in the width direction when viewed from the front, and is formed in an arcuate shape (arc shape) that protrudes rearward when viewed from the side in the width direction. ing. The stage 19 is disposed to face the front side with a space from the film forming nozzle 18. The stage 19 is disposed such that the front surface thereof is in contact with the rear wall of the roll casing 43. Specifically, the stage 19 is disposed in the middle of the delivery opening 12 and the winding opening 17 in the vertical direction. The most convex portion 35 of the stage 19 is closest to the ejection port of the film forming nozzle 18, and the film 3 is coated with the powder 3 ejected from the film forming nozzle 18 at the most convex portion 35.

  The stage 19 is supported and fixed by a roll casing 43.

  The powder coating apparatus 40 includes a pressure adjustment unit 16 including a gas inflow pipe 30. The gas inlet pipe 30 is provided in the roll casing 43.

  The gas inflow pipe 30 has one end portion (outflow side end portion) located inside the roll casing 43, and the other end portion (inflow side end portion) is a front wall of the apparatus casing 6 and the roll casing 43. It arrange | positions so that it may penetrate and may be located in the exterior of the casing 6 for apparatuses. One end of the gas inflow pipe 30 is disposed below the take-up roll 14 in the roll casing 43.

  About the coating method which adheres the powder 3 to the film 2 using the powder coating apparatus 40 of 2nd Embodiment, it can implement similarly to the powder coating apparatus 1 of 1st Embodiment.

  That is, as shown in FIG. 2, the film 2 is set in the delivery / winding unit 42. That is, similarly to the first embodiment, the film 2 is wound around the delivery roll 10, and the first tension roll 11a, the second tension roll 11b, the delivery opening 12, the most convex portion 35 of the stage 19, and the third tension roll. 15 a, the fourth tension roll 15 b and the winding opening 17 are sequentially passed and locked to the winding roll 14.

  Next, by flowing gas into the roll casing 43 through the gas inflow pipe 30, the internal pressure of the roll casing 43 is reduced to the internal pressure of the apparatus casing 6 (specifically, the space occupied by the roll casing 43 is excluded). Set higher than space pressure.

  The internal pressure of the roll casing 43 is, for example, 10 Pa or more, preferably 50 Pa or more, more preferably 100 Pa or more, and for example, 80000 Pa or less, preferably 10000 Pa or less, more preferably 2100 Pa or less.

  The difference between the internal pressure of the roll casing 43 and the internal pressure of the apparatus casing 6 is, for example, 10 Pa or more, preferably 100 Pa or more, and for example, 10000 Pa or less, preferably 1000 Pa or less.

  On the other hand, after filling the injection device 20 with the powder 3, the injection is performed from the film forming nozzle 18 toward the front side, that is, the film 2 to be conveyed by a known injection method.

  Thereby, the film 2 with the powder 3 attached (coated) on the surface is obtained.

  And according to this powder coating apparatus 40, the take-up roll 10, the take-up roll 14 arranged on the lower side (downstream in the transport direction) with respect to the send-out roll 10, the send-out roll 10 and the take-up roll 14 The film forming nozzle 18 disposed so as to face the film 2 in the middle of the up and down direction (midway in the transport direction), the roll casing 43 that accommodates the delivery roll 10 and the take-up roll 14, and the film forming nozzle 18 and the roll The apparatus casing 6 that accommodates the casing 43 and the pressure adjusting unit 16 that sets the internal pressure of the roll casing 43 higher than the internal pressure of the apparatus casing 6 are provided.

  Therefore, it is possible to prevent the powder 3 scattered in the relatively low-pressure apparatus casing 6 from entering the relatively high-pressure roll casing 43. As a result, it is possible to prevent the powder 3 from adhering to the delivery roll 10 and the take-up roll 14, the gear for driving the delivery roll 10 and the take-up roll 14, the coated film 2, and the like. Therefore, the influence by the powder 3 can be reduced.

  The powder coating apparatus 40 includes a roll casing 43, and the roll casing 43 accommodates the delivery roll 10 and the take-up roll 14.

  Therefore, since only the internal pressure of the roll casing 43 needs to be set higher than the internal pressure of the apparatus casing 6, the apparatus can be simplified.

  Further, in the powder coating apparatus 40, gas is fed from the outside of the apparatus casing 6 to the inside of the roll casing 43 using the gas inflow pipe 30 to adjust the internal pressure of the roll casing 43.

  Therefore, the internal pressure of the roll casing 43 can be set higher than the internal pressure of the apparatus casing 6 simply and reliably.

  In the embodiment of FIG. 2, the cleaning nozzle 31 is not provided. However, for example, as shown in FIG. 1, one or more cleaning nozzles 31 may be provided in the vicinity of the winding opening 17. .

  In the embodiment of FIG. 2, the air jet nozzle 32 is not provided. However, for example, as shown in FIG. 1, the air jet nozzle 32 may be provided in the vicinity of the delivery opening 12.

  In the embodiment of FIG. 2, the internal pressure of the roll casing 43 is set higher than the internal pressure of the apparatus casing 6 by flowing gas into the roll casing 43 through the gas inflow pipe 30. Although not shown, a vacuum pump or the like is attached to the apparatus casing 6 to lower the inside of the apparatus casing 6 to a low pressure. Can be set higher than the internal pressure of the casing 6 for an apparatus.

  In the embodiment shown in FIG. 2, the powder 3 is attached only to the surface of the film 2. Specifically, after the powder 3 is attached to the surface of the film 2 and the film 2 is completely wound around the winding roll 14, the winding roll 14 that winds up the film 2 and the delivery roll 10 are attached and detached. Exchange. Next, the film 2 is conveyed from the take-up roll 14 to the delivery roll 10 so that the powder 3 adheres to the back surface of the film 2 at the most convex portion 35 of the stage 19.

  Although not shown in the drawings, the powder 3 can be simultaneously attached to both surfaces of the film 2 by appropriately adjusting the shape and position of the stage 19 and further disposing a film forming nozzle on the front side of the stage 19.

  2 and 3 includes one film forming nozzle 18 formed so that the shape of the injection hole extends in the width direction. For example, although not shown, the film forming nozzle 18 is formed in the width direction. It is also possible to provide a plurality of film forming nozzles aligned with each other.

  In the embodiment of FIG. 2, four tension rolls (11a, 11b, 15a, 15b) are provided. For example, although not shown, the number of tension rolls can be increased or decreased as appropriate.

3. 4. Powder Coating Device by Aerosol Deposition An embodiment of the present invention of a powder coating device 50 using an aerosol deposition method will be described as a further specific example of the first embodiment with reference to FIG.

  The powder coating apparatus 50 of FIG. 4 includes an aerosol chamber 21 and a carrier gas transport device 24 as the injection device 20.

  The aerosol chamber 21 is a storage tank for storing the powder 3 and includes a vibration device 29 and a pressure gauge (not shown) for measuring the internal pressure of the aerosol chamber 21.

  The vibration device 29 is a device for vibrating the aerosol chamber 21 and the powder 3 in the aerosol chamber 21, and a known shaker is used.

  Further, a connecting tube 22 is connected to the aerosol chamber 21.

  The connecting pipe 22 is a pipe for transporting the aerosolized powder 3 (hereinafter, aerosol) from the aerosol chamber 21 to the apparatus casing 6, one end of which is connected to the aerosol chamber 21 and the other end. The film forming nozzle 18 is connected to the part.

  A connecting pipe opening / closing valve 23 is interposed in the middle of the connecting pipe 22. As the connection pipe on-off valve 23, for example, a known on-off valve such as an electromagnetic valve is used.

  The carrier gas transport device 24 includes a carrier gas cylinder 25 and a gas pipe 26.

  The carrier gas cylinder 25 is a cylinder that stores a carrier gas such as oxygen gas, helium gas, argon gas, nitrogen gas, and air, and is connected to the aerosol chamber 21 via a gas pipe 26.

  The gas pipe 26 is a pipe for transporting the carrier gas from the carrier gas cylinder 25 to the aerosol chamber 21, and one end thereof is connected to the carrier gas cylinder 25 and the other end is connected to the aerosol chamber 21. .

  A gas flow meter 27 is interposed in the middle of the gas pipe 26. The gas flow meter 27 is a device for adjusting the flow rate of the gas in the gas pipe 26 and detecting the flow rate, and a known flow meter is used.

  Further, in the middle of the gas pipe 26, a gas pipe opening / closing valve 28 is interposed on the aerosol chamber 21 side of the gas flow meter 27. As the gas pipe opening / closing valve 28, for example, a known opening / closing valve such as an electromagnetic valve is used.

  In the powder coating apparatus 50, a mechanical booster pump 33 and a rotary pump 34 are provided in the apparatus casing 6.

  The mechanical booster pump 33 and the rotary pump 34 are sequentially connected to the apparatus casing 6 in order to depressurize the inside of the apparatus casing 6 and depressurize the aerosol chamber 21 communicated with the apparatus casing 6 via the connecting pipe 22. Has been.

  In order to attach the powder 3 to the film 2 using such a powder coating apparatus 50, as described above, the film 2 is set in the transport unit 4, and then the first casing 9 and the first casing 9 are connected by the gas inflow pipe 30. 2 The internal pressure of the casing 13 is set higher than the internal pressure of the apparatus casing 6, and the film 2 is conveyed.

  Next, in the coating method in the powder coating apparatus 50, the following procedure is performed in the spraying step.

  First, in this step, the gas pipe on / off valve 28 is closed, the connecting pipe on / off valve 23 is opened, and the mechanical booster pump 33 and the rotary pump 34 are driven, whereby the inside of the apparatus casing 6 and the aerosol chamber are driven. 21 is depressurized.

  The internal pressure of the apparatus casing 6 is, for example, 5 to 80 Pa, and the internal pressure of the aerosol chamber 21 is, for example, 5 to 80 Pa.

  Next, in this method, the powder 3 is vibrated in the aerosol chamber 21 by the vibration device 29, the connecting pipe opening / closing valve 23 is closed, the gas pipe opening / closing valve 28 is opened, and the carrier gas is discharged from the carrier gas cylinder 25. The aerosol chamber 21 is supplied. Thereby, the powder 3 is aerosolized. Thereafter, the connecting pipe opening / closing valve 23 is opened, and the generated aerosol is transported to the film forming nozzle 18 via the connecting pipe 22. At this time, the aerosol collides with the inner wall of the film forming nozzle 18 and is crushed to become particles having a smaller particle diameter.

  The flow rate of the carrier gas adjusted by the gas flow meter 27 is, for example, 1 L / min or more, preferably 3 L / min or more, and for example, 150 L / min or less, preferably 100 L / min or less. is there.

  Next, in this method, the aerosol is sprayed from the spray port of the film forming nozzle 18 toward the surface of the film 2.

  The internal pressure of the aerosol chamber 21 during aerosol injection is, for example, 50 Pa or more, preferably 1000 Pa or more, and for example, 1 atm or less, preferably 50000 Pa or less.

  At this time, the first casing 9 and the second casing 13 are supplied with gas from the gas inflow pipe 30 therein, so that their internal pressure is higher than the internal pressure of the apparatus casing 6 as described above. Is set.

  For example, the difference between the internal pressure of the apparatus casing 6 and the internal pressure of the first casing 9 or the second casing 13 is, for example, 10 Pa or more, preferably 100 Pa or more, and for example, 10000 Pa or less, preferably , 1000 Pa or less.

  Moreover, the temperature in the aerosol chamber 21 during aerosol injection is, for example, 0 to 50 ° C.

  Thereby, the powder 3 adheres to the surface of the film 2.

  According to this powder coating apparatus 50, since the powder 3 is coated by the aerosol deposition method, a dense powder layer or a porous powder layer can be formed on the surface of the film 2. In particular, when metal oxide particles are used as the powder 3, a dense metal oxide layer or a porous metal oxide layer can be easily formed.

  Moreover, since the powder coating apparatus 50 employs a roll-to-roll method, the film 2 coated with the powder layer can be manufactured much more efficiently than the conventional batch method.

  Moreover, since the powder coating apparatus 50 can set the internal pressure of the 1st casing 9 and the 2nd casing 13 higher than the internal pressure of the casing 6 for apparatuses, the powder 3 is the delivery roll 10 and the winding roll 14 Thus, it is possible to prevent the delivery roll 10 and the take-up roll 14 from being attached to the gear, the coated film 2 and the like. Therefore, the influence by the powder 3 can be reduced.

DESCRIPTION OF SYMBOLS 1 Powder coating apparatus 2 Film 3 Powder 6 Apparatus casing 9 1st casing 10 Sending roll 13 2nd casing 14 Winding roll 16 Pressure adjustment unit 18 Film formation nozzle 30 Gas inflow pipe 32 Cleaning nozzle 40 Powder coating apparatus 43 Casing for roll 50 Powder coating equipment

Claims (5)

A powder coating apparatus for attaching powder to a film,
A delivery roll for delivering the film;
A winding roll disposed on the downstream side in the transport direction of the film with respect to the delivery roll, and winding the film;
In the middle of the transport direction of the delivery roll and the take-up roll, the nozzle is arranged so as to face the film, and ejects the powder.
One or more roll chambers that house the delivery roll and the take-up roll;
A chamber for the device that houses the nozzle and the chamber for the roll;
A pressure adjusting unit configured to set an internal pressure of the roll chamber higher than an internal pressure of the apparatus chamber ;
The powder coating apparatus according to claim 1, wherein the pressure adjusting unit includes a gas delivery unit that feeds gas into the roll chamber . With two roll chambers,
One roll chamber contains the delivery roll,
The powder coating apparatus according to claim 1, wherein the other roll chamber accommodates the winding roll. With one roll chamber,
The powder coating apparatus according to claim 1, wherein the one roll chamber accommodates the delivery roll and the take-up roll. The air jet nozzle further arrange | positioned so that the said film may be opposed to the downstream of the said sending roll in the said conveyance direction, and the upstream of the said nozzle, It is any one of Claims 1-3 characterized by the above-mentioned. The powder coating apparatus according to item. A cleaning nozzle that is disposed on the downstream side of the nozzle in the transport direction and on the upstream side of the winding roll so as to face the film and removes excess powder adhered to the film; The powder coating apparatus according to any one of claims 1 to 4, wherein the powder coating apparatus is characterized.

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